手把手教你制作简易计算器

7ff75399e853db52cbc30fd1bf07a1f6_%E6%84%9F%E8%B0%A2%E8%AF%BB%E8%80%85.png

实现过程: HTML+Css+JS 具体通过标签实现计算器整个的框架 通过Css样式实现计算器页面布局及框架优化 通过JavaScript+算法实现计算器计算过程

次实验过程: 背景图片+背景音乐(看个人意愿加!)

安排:

代码语言:javascript
复制
<!--HTML源码页-->
<head>
  <link rel="icon" href="猫.png
    ">
  <title>
    简易计算器
  </title>
</head>
<body background="5-121106095005.gif"
  </body>
<h2><p align="center">此工具由白猫制作完成!</p></h2>
<link href="计算器.css
  " rel="stylesheet" type="text/css" />
<script src="计算器.js
  "></script>
<table id="calculater" onClick="calculater()">
  <tr>
    <td id="display" colspan="5">0</td>
  </tr>
  <tr>
    <td class="numberkey" >1</td>
    <td class="numberkey" >2</td>
    <td class="numberkey" >3</td>
    <td class="numberkey" >+</td>
    <td class="numberkey" id="deletesign"><a href="计算器.htm" class="item">归零</a></td>
  </tr>
  <tr>
    <td class="numberkey" >4</td>
    <td class="numberkey" >5</td>
    <td class="numberkey" >6</td>
    <td class="numberkey" >-</td>
    <td rowspan="3" id="equality" onclick="resultscalcaulte()">=</td>
  </tr>
  <tr>
    <td class="numberkey" >7</td>
    <td class="numberkey" >8</td>
    <td class="numberkey" >9</td>
    <td class="numberkey" >*</td>
  </tr>
  <tr >
    <td class="numberkey" >+/-</td>
    <td class="numberkey" >0</td>
    <td class="numberkey" >.</td>
    <td class="numberkey" >/</td>
  </tr>
  <script>
    alert("手把手教你制作简易计算器!")
  </script>
代码语言:javascript
复制
/*CSS样式源码页*/
*{

padding:0;

margin:1px;

}

#calculater{

margin: auto;

margin-top: 30px;

border: solid 6px #2371D3;

border-spacing: 0px;

}

#display{

width: 100%;

height: 30px;

border-bottom: solid 4px #2371D3;

font-weight: bold;

color: #193D83;

font-family: 黑体;

padding-left: 2px;

}

.numberkey{

cursor: pointer;

width: 40px;

height: 30px;

border: solid 1px #FFFFFF;

background: #2371D3;

color: #ffffff;

text-align: center;

font-weight: bold;

font-family: 黑体;

}

#equality{

cursor: pointer;

width: 40px;

height: 100%;

background: #2371D3;

border: solid 1px #FFFFFF;

color: #ffffff;

text-align: center;

font-weight: bold;

font-family: 黑体;

}

.numberkey:hover{

background: #EA6F30;

}

#equality:hover{

background: #EA6F30;

}

代码语言:javascript
复制
/JS计算器算法源码页/
var results="";

var calresults="";

function calculater(){

if (event.srcElement.innerText=="=") {

return;

}

results+=event.srcElement.innerText;

display.innerText=results;

}

function resultscalcaulte(){

calresults=eval(results);

display.innerText=calresults;

}

过程检验:

image.png

总体框架完美实现

image.png
image.png

算法逻辑检验正确

image.png

归零内部逻辑正确

检验成功! 简易计算器制作完成!!